Firstly: Sorry for the long posting, but I want to describe the issues in detail and provide further information. Also I couldn't activate BBCode, so it might be not as readable as it would be with BBCode.

It is DLNA-certified, I installed the latest firmware and I use the latest TwonkyServer 6.0.37 to stream audio, pics and video from my Win7 multimedia-PC to the TV. Most of my audio is mp3 in various bitrates, most of my pics are jpeg, and most of my videos are avi/divx and also some HD mkv's.

When I started, I couldn't get the TV to play any videos at all, so I did some research in forums how to set up the server correctly. So let's get straight to what I found out and what I am still wondering about:

The TV didn't play any videos ("Unable to play file: Unknown format") unless I told the server in its settings, this was "Philips Streamium AV" - just TV or Renderer TV didn't work.Streamium AV works fine, it even plays mkv files. But I had two problems: Firstly all pictures were in thumbnail size, so for that the was useless. And secondly there was no way to fast forward / rewind during the videos via the TVs remote control.

Some searching later I found a clue to set the device to "Panasonic VIERA", so I did. Now the TV showed the pics correctly and I could FF/REW in videos.But now the TV wouldn't play mkv files anymore. Annoying. So essentially I want a mix of settings from VIERA and Streamium AV for my TV to get the pics correctly, play mkv and FF/REW. So how to get that?

Some research later I knew, all settings for the different playback devices were in the "clients.db"-file. So I fiddled a bit with it, but didn't get far.

Although I fixed the problem for the Streamium with the pictures: In its section in the clients.db change the "TR:"-line to "TR:JPEG1920x1080,JPEG138x103,MP3,WAV,WMV" (put the higher (HD) resolution in front of the lower resolution). Now it shows all the pictures in full screen size. But that's all I could manage to fix.

Here are some of my further thoughts:

- The FF/REW problem could be linked to the DLNA-setting for the Streamium AV, because there it says "DLNANO" (no DLNA functionality). The VIERA is set to "DLNA15" so it seems to support DLNA natively. But simply changing it didn't work for me, just made all videos unplayable.

- The mkv-Problem for the VIERA could be fixed by setting the "MT:"-part right, but I couldnt get it to work properly. Whenever I changed something, it just made all videos unplayable or nothing happened at all. Maybe some combination like "MT:mkv video/x-mkv" or ".../x-matroska", don't know, didn't get it right.

- I believe the actual codec of the videos is irrelevant (or at least not first priority), because the TV can play all of them correctly. In my opinion it's the problem, how the settings for the different devices are implemented.

I have to say, I don't understand completely, what the all tags and different options mean and how they work and how I could use them correctly. So any help would be appreciated.

At last: The question:Any proposition how to change the settings, so that I can play all video types, FF/REW during playback and view the pics in the appropriate size?

I think it is a server issue. I have a Philps 32PFL9705 and a Qnap TS-859 Pro. I tried Twonky 6.0.38, played a bit with the settings, than some files (avi, wmv) works with FF/REW, but some other things are not working anymore. Then i installed PS3 Media Server and most of my files works as expected.

One thing that seems to be important is to set HP: chunked in the clients.db for Philips TV Renderer. On my TV i could FW/REW avi and wmv then.